Overview
Knife in the Water is a 1962 Polish psychological thriller film co-written and directed by Roman Polanski in his feature debut, and starring Leon Niemczyk, Jolanta Umecka, and Zygmunt Malanowicz. Its plot follows a husband and wife who are accompanied on a boating trip by a young male hitchhiker, who spurs a number of escalating confrontations between the couple.
The film was nominated for Academy Award for Best Foreign Language Film and is Polanski's only Polish-language feature to date. Knife in the Water has garnered acclaim from film critics since its release, and is one of Polanski's best-reviewed works. American filmmaker Martin Scorsese recognized the film as one of the masterpieces of Polish cinema and in 2013 he selected it for screening alongside films such as Andrzej Wajda's Ashes and Diamonds and Innocent Sorcerers in the United States, Canada and United Kingdom as part of the Martin Scorsese Presents: Masterpieces of Polish Cinema festival of Polish films.
Plot
Andrzej (Leon Niemczyk) and Krystyna (Jolanta Umecka) are driving to a lake to go sailing when they come upon a young man (Zygmunt Malanowicz) hitchhiking in the middle of the road. After nearly hitting him, Andrzej invites the young man along. When they arrive at the lake, instead of leaving the young man behind, Andrzej invites him to go sailing with them. The young man accepts the offer, and, not knowing much about sailing, must learn many hard lessons from Andrzej.
Meanwhile, tension gradually builds between Andrzej and the hitchhiker as they vie for the attentions of Krystyna. The title refers to the major turning point in the film when Andrzej taunts the young man with the latter's treasured pocket knife, which is accidentally lost overboard. A fight ensues between Andrzej and the hitchhiker and the latter falls into the water. Andrzej and his wife search for him, but cannot find him and assume that he has drowned, since earlier he said that he could not swim. Andrzej and his wife quarrel about what to do, and Andrzej swims to shore to fetch the police. When the young man realizes that Andrzej has gone he comes out from hiding behind a buoy on the lake and swims to the yacht. There he sees Krystyna naked drying off. He boards the yacht and Krystyna tells him he is as bad as Andrzej but sexual attraction wins out and they have sex, off screen.
From Wikipedia (CC BY-SA 4.0).